linux-kernel - Re: [PATCH 1/6] memcg: fix unused variable warning

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Message-ID: <20111226064734.GA13355@shutemov.name>
Date:	Mon, 26 Dec 2011 08:47:34 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	Balbir Singh <bsingharora@...il.com>,
	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH 1/6] memcg: fix unused variable warning

On Mon, Dec 26, 2011 at 03:42:52PM +0900, KAMEZAWA Hiroyuki wrote:
> On Mon, 26 Dec 2011 08:36:52 +0200
> "Kirill A. Shutemov" <kirill@...temov.name> wrote:
> 
> > On Mon, Dec 26, 2011 at 03:25:31PM +0900, KAMEZAWA Hiroyuki wrote:
> > > On Sat, 24 Dec 2011 05:00:14 +0200
> > > "Kirill A. Shutemov" <kirill@...temov.name> wrote:
> > > 
> > > > From: "Kirill A. Shutemov" <kirill@...temov.name>
> > > > 
> > > > mm/memcontrol.c: In function ‘memcg_check_events’:
> > > > mm/memcontrol.c:784:22: warning: unused variable ‘do_numainfo’ [-Wunused-variable]
> > > > 
> > > > Signed-off-by: Kirill A. Shutemov <kirill@...temov.name>
> > > 
> > > Hmm ? Doesn't this fix cause a new Warning ?
> > > 
> > > mm/memcontrol.c: In function ?memcg_check_events?:
> > > mm/memcontrol.c:789: warning: ISO C90 forbids mixed declarations and code
> > 
> > I don't see how. The result code is:
> > 
> > 	if (unlikely(mem_cgroup_event_ratelimit(memcg,
> > 						MEM_CGROUP_TARGET_THRESH))) {
> > 		bool do_softlimit;
> > 
> > #if MAX_NUMNODES > 1
> > 		bool do_numainfo;
> > 		do_numainfo = mem_cgroup_event_ratelimit(memcg,
> > 						MEM_CGROUP_TARGET_NUMAINFO);
> > #endif
> > 		do_softlimit = mem_cgroup_event_ratelimit(memcg,
> > 						MEM_CGROUP_TARGET_SOFTLIMIT);
> > 		preempt_enable();
> > 
> > 		mem_cgroup_threshold(memcg);
> > 
> 
> Ah. please see linux-next and rebase onto that.

The patchset is on top of next-20111222. Have I missed something?

> 
> Thanks,
> -Kame
> 

-- 
 Kirill A. Shutemov
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